Late Rice Symptom Prevention and Treatment
Late rice senescence usually occurs from heading to maturity. Symptoms are brownish-colored leaves, thin and curved leaves, white tips appear dead, and roots are weak and dark. The main reason for the occurrence of premature aging is due to improper regulation of water and fertilizer or the occurrence of certain pests and diseases, which has a great impact on the yield. Specific prevention methods are as follows:
First, for the premature failure of water and fertilizer regulation caused by the field, in the heading, Yanghua, filling period should be kept shallow. The soil with poor viscous and poor ventilation should adopt the method of inter-regional irrigation: that is, a shallow water should be poured, and it should be dried after 2 to 3 days. This can solve the contradiction between water and gas, and it is beneficial to the normal rice. Grow. For the deferred fertilizer field blocks, fertilizers should be added in time, and 1%-2% potassium dihydrogen phosphate and 2% urea mixed liquor can be used for extra-root dressing 2 to 3 times, and 25 to 30 kilograms of fertilizer fertilizers for 3 mu. Spray once every 5 days, can receive good results.
Second, the prevention of pests and diseases: There are many types of diseases and pests in late rice. In the later stage, it is very difficult to achieve the effect of comprehensive prevention and control by using a single insecticide or fungicide. It is very unfavorable to prevent and treat premature senescence in late rice. It has been proved through practice that the application of triadimefon in late rice can not only completely control the occurrence of a series of diseases (such as sheath blight, tip blight, leaf spot disease, rice rot, leaf sheath decay, etc.), but also have protection. The comprehensive efficacy of chlorophyll, prevention of premature aging, increase of seed setting rate and 1000-grain weight is very significant. Specific application methods: Apply 20% triamcinazole EC 50g or 25% triadimefon wettable powder 40g per acre, and apply 50-60kg water to the late rice breakage period and full heading stage. In addition, triadimefon also has the advantages of being mixed with various pesticides. For example, pests occurring concurrently with the disease can be found and mixed pesticides can be sprayed on the counterpart.
First, for the premature failure of water and fertilizer regulation caused by the field, in the heading, Yanghua, filling period should be kept shallow. The soil with poor viscous and poor ventilation should adopt the method of inter-regional irrigation: that is, a shallow water should be poured, and it should be dried after 2 to 3 days. This can solve the contradiction between water and gas, and it is beneficial to the normal rice. Grow. For the deferred fertilizer field blocks, fertilizers should be added in time, and 1%-2% potassium dihydrogen phosphate and 2% urea mixed liquor can be used for extra-root dressing 2 to 3 times, and 25 to 30 kilograms of fertilizer fertilizers for 3 mu. Spray once every 5 days, can receive good results.
Second, the prevention of pests and diseases: There are many types of diseases and pests in late rice. In the later stage, it is very difficult to achieve the effect of comprehensive prevention and control by using a single insecticide or fungicide. It is very unfavorable to prevent and treat premature senescence in late rice. It has been proved through practice that the application of triadimefon in late rice can not only completely control the occurrence of a series of diseases (such as sheath blight, tip blight, leaf spot disease, rice rot, leaf sheath decay, etc.), but also have protection. The comprehensive efficacy of chlorophyll, prevention of premature aging, increase of seed setting rate and 1000-grain weight is very significant. Specific application methods: Apply 20% triamcinazole EC 50g or 25% triadimefon wettable powder 40g per acre, and apply 50-60kg water to the late rice breakage period and full heading stage. In addition, triadimefon also has the advantages of being mixed with various pesticides. For example, pests occurring concurrently with the disease can be found and mixed pesticides can be sprayed on the counterpart.
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